Joist-boring tool.



Patented July l5, |902 nl: Nunms Pinus co, morouvno.. wAsHlNsYoN, n c.

UNiTnn STATES PATENT OFFICE.

STEPHEN MCCLELLAN, OF BROOKLYN, NEW YORK.

JOIST-BORING TOOL.

SPECIFICATION forming part 0f Letters Patent NO. 704,657, dated. July 15, 1902.

Application filed September 10,1901. Serial No.75,075. (No model.)

.To @ZZ whom it may concern:

Beit known that I, STEPHEN MCCLELLAN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Joist-Boring Tools, of which the following is a specification.

Hy invention isan automatic or hand-feed joist-boring machine; and it consists ofaframe in which is revolved a slotted hollow cylinder,

and running backward and forward in said cylinder and operated by au automatic or a hand-feed lever is a chuck-bearing auger or a drill.

In the accompanying drawings, Figure 1 is aside elevation of my invention. Fig. 2 is a vertical sectional view oi the upper part of the machine. Fig. 3 is atop view of thelever. Fig. 4 is a modification of the automatic feeding device.

My invention is described as follows:

i lisa rod which may or may not be hollow. To the upper end of this rod is secured a framework consisting of a lower cross-beam 2, having projecting from each edge and near the center of the cross-bar arms 3 to serve as fulcrums. Extending upwardly from each end of said cross-beam are perforated end pieces 4 and 5 and a top cross-bar 6, all of said six pieces firmly secured together or cast in one piece. .Iournaled in the perforations in the end pieces is a cylinder 7, the ends of said cylinder protruding beyond the outer face of said end pieces and provided with suitable collars to keep the cylinder from slipping endwise. Said cylinder is provided with two or more longitudinal slots 7-1f., Vorking in said cylinder and adapted to move from one end to the other of the same is a chuck 8, and secured in the chuck 8 by a set-screw or other suitable means 9 is an auger or a drill 10. Fitting around the cylinder and fastened rigidly to the chuck by means of screws 11 is a grooved wheel 12. Said wheel is secured to the chuck by the said screws 11 passing through the wheel edgewise and through the slots 711; of the cylinder and then into the chuck, so that when the cylinder turns the wheel and chuck turn with it, or the wheel and chuck may be moved from one end of the cylinder, inside of the end pieces, to the other.

Fulcrumed to the lower ends of the extension 3 is preferably a double lever 13, one arm extending up on one side of the frame and the other on the other side of the frame. The two arms are held a certain distance apart by means of a cross-rod 14, which passes through the said double lever just above the lower bar 2 of the frame, the two ends extending upwardly, and extending inwardly from each end are pins 15, each of which works inthe groove of the wheel12. The lower end of this lever extends downwardly and has on its lower end a handheld 16; but should I choose to do so to lighten and cheapen the lever I can from the cross-bar 14 leave off one side of the double lever, only using the one arm from this point, and secure n ut 17 to the lower end of said lever. In the bend ofsaid lever is pivoted a threaded nut 17, and through the threaded nut works a threaded rod 18. This threaded nut and rod are for the purpose of feeding the drill or bit automatically, and when I desire to feed the machine rapidly I use the rod 18 and the nut 17 with coarse threads; but when I desire to feed the machine slowly I use liner threads on the rod and in the nut. Thus I can use Several grades of threaded rods and `several grades of threaded nuts and can provide for any rapidity for feeding necessary; but in case I desire to feed the machine by hand I can release the rod 18 and the nut 17 from their connections and remove them from the machine, and then I can operate the handle by hand, thus feeding the bit by hand.

As a modification of my feeding device, should I desire to do so,I can use rod 18 smooth and nut 17 smooth and then on the outer end of rod 18 fit over ita coil-spring between its outer end and the nut 17, thus giving a spiral-spring feed instead ofscrew-feed, using a pin through the outer end of the rod 18 ora nut to keep the spring on the rod. p

Rigidly secured to one end of the slotted cylinder 7 is a sprocket-wheel 19.

Adjustably secured to the rod 1 is a bearing 20,and journaled in said bearing is a shaft 21, which shaft runs entirely through the bearing and through the rod 1,and on one end of the shaft and preferably cast with it is a sprocket-wheel 22, and working on said sprocket-wheel is a sprocket-chain 23.

One end of shaft 21 is arranged with notches around it for the spring-pawl 43 on end of the ratchet crank-handle 24 to work in.. Said ratchet-handle is secured to shaft 21 or setscrews 44, and to the other end of the. rod 2l is secured an eye 25, in which is hooked the hooked end of the threaded rod 18; but this may be connected byany other suitable swivel attachment.

Now by moving the lower end of the lever 13 to the right I move the groove-wheel 12, the chuck 8, and the augerlO to theleft, and when I move the lower end of the lever to the left I move said grooved wheel, chuck, and auger to the right, and when I rotate the crank-handle 24 I thereby rotate the sprocketwheel 22 and the sprocket-wheel 19, and this rotates the cylinder, the chuck, and theauger, because the sprocket-wheel 19 is rigidly secured to the cylinder and because the grooved wheel is rigidly secured to the chuck by means of the screws 11, which pass through the slots 7% into the chuck. Thus it will be seen that the cylinder,'the chuck, and the auger, and the grocved wheel rotate; but the pins 15 slide in the groove of the said grooved wheel, allowing,it to revolve with the cylinder with very little friction, and thus push the said grooved wheel, chuck, and bit back and forth by the means hereinabove described, and when the wheel 22 is rotated the shaft 2l is also rotated. A rod 18 is secured to the eye of said shaft. Said rod 18 is also rotated, and as it works through the nut 17,

v-,whichis pivoted in the lower end of the double 1' 27` and extending from said sleeve 27 is an arm 28, having extending vertically from its outer end a projection 29. Said arm has on its outer and upper face a smooth-,bore cylinder 30. Extending from the upper face near the inner end of the said arm 28 is a bearing 31, and journaled in said bearing is one end of a threaded rod 32, and near this end of the said threaded rod isrigidly se-V cured a knurled wheel 33, and on the outer part of said rod 32 works an internally-threaded cylinder 34. Said cylinder has in its lower face a groove (represented by dotted lines 35) into which groove works a set-screw 3G, which passes through a threaded boss 37 of the arm 28. This set-screw sets said cylinder 34 and at the same time keeps it from turning. On the end ofv said cylinder is adjustably secured a head 38, provided with a vertical projection 39, corresponding to the above-mentioned projection 29. The purpose of this construction just mentioned and the forks 29 and 39 is to secure the machine to the j oists 40 while the boringisbeingdonc. Byturning the-knurled wheel 33 on rod 32 forks 29 and forks 39 are adjusted to suit any width joists.

One of the advantages of my tool is that theauger or drill may be drawn entirely into the cylinder7, thus enabling me to construct my machine much shorter than machines of this kind have heretofore vbeen made, and therefore enabling me to work between joists milch closer together.

Another advantage of my machine is that the lever beingjfulcrumed in or near the middle of the frame and its upper end operating between the two ends of the frame also enables me to build my machine much shorter than machines of this kind have heretofore been built, and the great length of the lower arms compared With upper arms from joint of fulcrum gives me much power for all classes of iron or wood drilling.

Another advantage of my machine is the adjustable sleeve 27 of the clamping device, enablingl me to easily secure my machine either high or low on the joist, moving it up or down to any point on rod 1,-and thus enabling me to drill my holes near the upper or lower edge of the joist. In places lwhere the clamping device 27 could not be used to hold the machine to the joist then I can use the two screw-threaded bolts 41 and 42, which pass through the ends 4 and 5 of the frame, and they can be screwed back against the other joist to hold the machine in place while boring or drilling.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A joist-boring machine, consisting of a rod; a rectangular frame secured on one end of said rod; said frame having through its end pieces perforations; a hollow slotted cylinder, journaled in the perforations of said end pieces; collars secured on said cylinder, preventing it from slipping to the right or left; a perforated grooved wheel encircling said cylinder and adapted to be moved longitudinally on said cylinder; a chuck situated inside of said cylinder, and adapted to be moved longitudinally therein, and to carry a boring device; screws passing through the perforations in the grooved wheel, through the slots in the slotted cylinder, and into the chuck, securing said chuck rigidly to said grooved wheel; fulcrum-arms secured to, and extending below the frame; a double lever fulcrumed to said arms, its upper ends, one passing up on one edge of said grooved wheel, and the other on the other edge thereof; pins secured in the upper ends of said double lever, and working in the groove of said wheel, the lower end of said lever extending downwardly and Within reach of the operator; a sprocket-wheel rigidly secured on one end of said cylinder; a sleeve situated on saidrod, near its lower end; ashaft journaled in said sleeve and rod; sprocket-wheel rigidly secured on said shaft; a sprocket-chain working on said sprocket-wheels; a crank-handle secured to the end of last-mentioned shaft, with means for securing the said machine to the j oist,substantially as shown and described and for the purposes set forth.

2. A joist-boring` machine, consisting of a rod a rectangular frame secured on one end IOO IIO

of said rod; said frame having through its end pieces perforations a hollow slotted cylinder, journaled in the perforations of said end pieces; collars secured on said cylinder, preventing it from slipping to the right or left; a perforated grooved wheel encircling said cylinder and adapted to be moved longitudinally on said cylinder; a chuck situated inside of said cylinder, and adapted to be moved longitudinally therein, and to carry a boring device; screws passing through the perforations in the grooved wheel, through the slots in the slotted cylinder, and into the chuck, securing said chuck rigidly to said groovedwheel; fulcrum-arms secured to, and extending below the frame; a double lever fulcrumed to said arms, its upper ends, one passing up on one edge of said grooved wheel, and the other on the other edge thereof; pins secured in the upper ends of said double lever, and working in the groove of said wheel, the lower end of said lever extending downwardly and within reach of the operator, and adapted to be operated by any suitable means; a sprocket-wheel rigidly secured on one end of said cylinder; a sleeve situated on said rod, near its lower end; a shaft journaled in said sleeve and rod; sprocket-Wheel rigidly secured on said shaft; a sprocket-chain working on said sprocket-wheels; a crank-handle secured to the end of last-mentioned shaft, with means for securing the said machine to the joist,substantially as shown and described and for the purposes set forth.

3. A joist-boring machine, consisting of a rod; a rectangular frame secured on one end of said rod; said frame having through its end perforations; a hollow slotted cylinder, journaled in the perforations of said end pieces; collars secured on said cylinder, preventing it from slipping to the right or left; a perforated grooved wheel encircling said cylinder and adapted to be moved longitudinally on said cylinder; a chuck situated inside of said cylinder, and adapted to be moved longitudinally therein, and to carry a boring device; screws passing through the perforations in the grooved wheel, through the slots in the slotted cylinder, and into the chuck, securing said chuck rigidly to said grooved wheel; fulcrum-arms secured to, and extending below the frame; a double lever fulcrumed to said arms, its upper ends, one passing up on one edge of said grooved Wheel, and the other on the other edge thereof; pins secured in the upper ends of said double lever, and working in the groove of said wheel, the lower end of said lever extending downwardly and within reach of the operator, and a force-spring, adapted to feed the same; a sprocket wheel rigidly secured on one end of said cylinder; a sleeve situated on said rod, near its lower end; a shaft journaled in said sleeve carrying a sprocket wheel; a sprocket-chain working on said sprocket- Wheels; a crank-handle secured to the end of the last-mentioned shaft, with means for securing the said machine to the joist, substantially as shown and described and for the purposes set forth.

4. In combination with a joist-boring machine, a sleeve vertically adjustably secured on the main rod below the boring device; an arm extending from said sleeve at right angle to said rod, and having a vertical projection extending from the outer end of said arm; an internally-threaded cylinder adapted to move back and forward in said arm, and having extending upwardly from its outer end a projection, corresponding to first-mentioned projection; said projections adapted to grasp and hold between them a joist; a threaded screw bearing a knurled nut journaled in the bearing of the first-mentioned arm, and turning in the cylinder; a thumb-screw Working up through a threaded perforation in the firstmentioned arm, its point entering a longitudinal groove in last-mentioned cylinder, substantially as shown and described and for the purposes set forth.

5. In combination with a joist-boring machine, a sleeve vertically adjustably secured near the lower end of the rod; a shaft working horizontally through said sleeve; a threaded nut swiveled in the lower end of a double lever; a threaded rod working through said threaded nut, one end being swiveled to the adjacent end of the shaft; a ratchet-crank secured to the other end of said shaft, whereby said shaft and said last-mentioned rod may be rotated and the lower end of said double lever moved back or forward, substantially as shown and described and for the purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

STEPHEN MCCLELLAN.

Witnesses:

WM. EIERMANN, R. C. DE NEAN.

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